In a similar situation before I've done two things:
- Tell the people that are on my call that I'll be back later, because I have to answer the door
- Pretend nothing is happening but my call
Both times it was awkward AF.

I can't pretend nothing is happening because when the door rings, my dog gets even more excited ( she starts to make acute noises hard breathing, etc…)
Once it happened during a call and the CEO was asking me a question that I have already asked her to repeat one time… :'(